CN112552007A - Premixed dry-mixed waterproof heat-insulating gypsum mortar - Google Patents
Premixed dry-mixed waterproof heat-insulating gypsum mortar Download PDFInfo
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- CN112552007A CN112552007A CN202011553113.6A CN202011553113A CN112552007A CN 112552007 A CN112552007 A CN 112552007A CN 202011553113 A CN202011553113 A CN 202011553113A CN 112552007 A CN112552007 A CN 112552007A
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- parts
- micro bubbles
- gypsum mortar
- vitrified micro
- mixed
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- 239000011426 gypsum mortar Substances 0.000 title claims abstract description 63
- 238000002156 mixing Methods 0.000 claims abstract description 43
- 239000005011 phenolic resin Substances 0.000 claims abstract description 27
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 claims abstract description 26
- 238000002360 preparation method Methods 0.000 claims abstract description 26
- 229920001568 phenolic resin Polymers 0.000 claims abstract description 25
- 238000009413 insulation Methods 0.000 claims abstract description 20
- 239000003607 modifier Substances 0.000 claims abstract description 20
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims abstract description 18
- 229910052602 gypsum Inorganic materials 0.000 claims abstract description 16
- 239000010440 gypsum Substances 0.000 claims abstract description 16
- 238000010438 heat treatment Methods 0.000 claims abstract description 15
- 238000004321 preservation Methods 0.000 claims abstract description 11
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims abstract description 10
- 229920002472 Starch Polymers 0.000 claims abstract description 9
- 239000004568 cement Substances 0.000 claims abstract description 9
- 239000008107 starch Substances 0.000 claims abstract description 9
- 235000019698 starch Nutrition 0.000 claims abstract description 9
- 229920001187 thermosetting polymer Polymers 0.000 claims abstract description 5
- 239000001913 cellulose Substances 0.000 claims abstract description 4
- 229920002678 cellulose Polymers 0.000 claims abstract description 4
- 239000012745 toughening agent Substances 0.000 claims abstract description 4
- 230000004048 modification Effects 0.000 claims description 24
- 238000012986 modification Methods 0.000 claims description 24
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 23
- 229910052710 silicon Inorganic materials 0.000 claims description 23
- 239000010703 silicon Substances 0.000 claims description 23
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 claims description 20
- 239000012752 auxiliary agent Substances 0.000 claims description 20
- 238000003756 stirring Methods 0.000 claims description 11
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 9
- 229910052796 boron Inorganic materials 0.000 claims description 8
- -1 boron modified phenolic resin Chemical class 0.000 claims description 7
- 239000000843 powder Substances 0.000 claims description 7
- 229920013822 aminosilicone Polymers 0.000 claims description 6
- 229910052500 inorganic mineral Inorganic materials 0.000 claims description 6
- 239000000314 lubricant Substances 0.000 claims description 6
- 239000011707 mineral Substances 0.000 claims description 6
- 239000003921 oil Substances 0.000 claims description 6
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 claims description 6
- FPCJKVGGYOAWIZ-UHFFFAOYSA-N butan-1-ol;titanium Chemical compound [Ti].CCCCO.CCCCO.CCCCO.CCCCO FPCJKVGGYOAWIZ-UHFFFAOYSA-N 0.000 claims description 5
- 238000006243 chemical reaction Methods 0.000 claims description 5
- HPNMFZURTQLUMO-UHFFFAOYSA-N diethylamine Chemical compound CCNCC HPNMFZURTQLUMO-UHFFFAOYSA-N 0.000 claims description 5
- 229910052757 nitrogen Inorganic materials 0.000 claims description 5
- 239000000126 substance Substances 0.000 claims description 5
- ZNOCGWVLWPVKAO-UHFFFAOYSA-N trimethoxy(phenyl)silane Chemical compound CO[Si](OC)(OC)C1=CC=CC=C1 ZNOCGWVLWPVKAO-UHFFFAOYSA-N 0.000 claims description 5
- 239000002383 tung oil Substances 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 25
- 239000004570 mortar (masonry) Substances 0.000 abstract description 20
- 238000010521 absorption reaction Methods 0.000 abstract description 14
- 230000000694 effects Effects 0.000 abstract description 12
- 230000007774 longterm Effects 0.000 abstract description 3
- 238000012360 testing method Methods 0.000 description 11
- 239000000243 solution Substances 0.000 description 8
- 230000000052 comparative effect Effects 0.000 description 7
- 238000010276 construction Methods 0.000 description 7
- RSIHJDGMBDPTIM-UHFFFAOYSA-N ethoxy(trimethyl)silane Chemical compound CCO[Si](C)(C)C RSIHJDGMBDPTIM-UHFFFAOYSA-N 0.000 description 7
- 239000011325 microbead Substances 0.000 description 7
- 239000011247 coating layer Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 230000009286 beneficial effect Effects 0.000 description 4
- 239000001866 hydroxypropyl methyl cellulose Substances 0.000 description 4
- 229920003088 hydroxypropyl methyl cellulose Polymers 0.000 description 4
- 235000010979 hydroxypropyl methyl cellulose Nutrition 0.000 description 4
- UFVKGYZPFZQRLF-UHFFFAOYSA-N hydroxypropyl methyl cellulose Chemical compound OC1C(O)C(OC)OC(CO)C1OC1C(O)C(O)C(OC2C(C(O)C(OC3C(C(O)C(O)C(CO)O3)O)C(CO)O2)O)C(CO)O1 UFVKGYZPFZQRLF-UHFFFAOYSA-N 0.000 description 4
- 229920001296 polysiloxane Polymers 0.000 description 4
- 239000001509 sodium citrate Substances 0.000 description 4
- NLJMYIDDQXHKNR-UHFFFAOYSA-K sodium citrate Chemical compound O.O.[Na+].[Na+].[Na+].[O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O NLJMYIDDQXHKNR-UHFFFAOYSA-K 0.000 description 4
- 238000011049 filling Methods 0.000 description 3
- 239000000654 additive Substances 0.000 description 2
- 230000000996 additive effect Effects 0.000 description 2
- 239000011083 cement mortar Substances 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 1
- 241001391944 Commicarpus scandens Species 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 150000004683 dihydrates Chemical group 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000011431 lime mortar Substances 0.000 description 1
- 238000011068 loading method Methods 0.000 description 1
- 239000002932 luster Substances 0.000 description 1
- 239000004005 microsphere Substances 0.000 description 1
- 239000011259 mixed solution Substances 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 150000002989 phenols Chemical class 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 238000007790 scraping Methods 0.000 description 1
- 239000003469 silicate cement Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 238000009827 uniform distribution Methods 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/14—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing calcium sulfate cements
- C04B28/142—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing calcium sulfate cements containing synthetic or waste calcium sulfate cements
- C04B28/144—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing calcium sulfate cements containing synthetic or waste calcium sulfate cements the synthetic calcium sulfate being a flue gas desulfurization product
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B14/00—Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B14/02—Granular materials, e.g. microballoons
- C04B14/04—Silica-rich materials; Silicates
- C04B14/22—Glass ; Devitrified glass
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
- C04B20/02—Treatment
- C04B20/023—Chemical treatment
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/27—Water resistance, i.e. waterproof or water-repellent materials
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/30—Mortars, concrete or artificial stone characterised by specific physical values for heat transfer properties such as thermal insulation values, e.g. R-values
- C04B2201/32—Mortars, concrete or artificial stone characterised by specific physical values for heat transfer properties such as thermal insulation values, e.g. R-values for the thermal conductivity, e.g. K-factors
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Civil Engineering (AREA)
- General Chemical & Material Sciences (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The application relates to the field of mortar, and particularly discloses premixed dry-mixed waterproof heat-preservation gypsum mortar. The gypsum mortar comprises the following components in parts by weight: 40-90 parts of desulfurized gypsum; 5-35 parts of cement; 20-40 parts of modified vitrified micro bubbles; 0.1-1 part of cellulose; 0.1-1 part of starch ether; 0.05-2 parts of a gypsum retarder; 0.1-1 part of toughening agent; the preparation process of the modified vitrified micro bubbles comprises the following steps: firstly, uniformly mixing 10-15 parts of thermosetting phenolic resin and 25-30 parts of absolute ethyl alcohol to obtain a modifier, uniformly mixing the modifier and the vitrified micro bubbles according to the mass ratio of (1-2:5), heating to 140-160 ℃, and curing for 20-30min to obtain the modified vitrified micro bubbles. The gypsum mortar has good thermal insulation performance, low water absorption and good long-term use effect.
Description
Technical Field
The application relates to the field of gypsum mortar, in particular to premixed dry-mixed waterproof heat-preservation gypsum mortar.
Background
The mortar is prepared by mixing inorganic cementing materials, fine aggregates and water in proportion and is used for masonry and plastering engineering. The mortar is divided into cement mortar, lime mortar and gypsum mortar according to different main materials. The gypsum mortar has the advantages of strong bonding property, less falling ash, early strength, quick hardening and the like, and is healthier, more environment-friendly, durable and durable than the cement mortar.
The premixed dry-mixed gypsum mortar is formed by physically mixing an inorganic cementing material, fine aggregates and an additive according to a certain proportion, and is granular or powdery. The premixed dry-mixed gypsum mortar is transported to a construction site in a bag or bulk form, and can be constructed and applied after being mixed with water.
The additive components of the gypsum mortar are different according to different requirements. For thermal insulation mortar, fillers with low thermal conductivity, such as vitrified micro bubbles, need to be added into the gypsum mortar. The vitrified micro bubbles are spherical fine-grained particles which are formed by treating acid vitreous lava minerals through a special technology and have porous inside and vitrified closed surfaces, and have the advantages of ventilation, high temperature resistance, heat insulation and the like. However, the vitrified micro bubbles are easy to break in the processes of loading, unloading, stirring and the like, so that the water absorption rate of the vitrified micro bubbles is greatly improved, and further, the mortar absorbs moisture at the later stage, the heat insulation performance is reduced, and the strength stability is poor, so that the vitrified micro bubbles are to be improved.
Disclosure of Invention
In order to ensure the using effect of the mortar, the application provides the ready-mixed dry-mixed waterproof heat-preservation gypsum mortar.
The application provides a premixed dry-mixed waterproof heat-preservation gypsum mortar, which adopts the following technical scheme:
a premixed dry-mixed waterproof heat-preservation gypsum mortar comprises the following components in parts by weight:
40-90 parts of desulfurized gypsum;
5-35 parts of cement;
20-40 parts of modified vitrified micro bubbles;
0.1-1 part of cellulose;
0.1-1 part of starch ether;
0.05-2 parts of a gypsum retarder;
0.1-1 part of toughening agent;
the preparation process of the modified vitrified micro bubbles comprises the following steps: firstly, uniformly mixing 10-15 parts of thermosetting phenolic resin and 25-30 parts of absolute ethyl alcohol to obtain a modifier, uniformly mixing the modifier and the vitrified micro bubbles according to the mass ratio of (1-2:5), heating to 140-160 ℃, and curing for 20-30min to obtain the modified vitrified micro bubbles.
By adopting the technical scheme, the desulfurized gypsum and the cement are jointly used as the cementing material. The cellulose has excellent water retention performance, can improve the cohesiveness and operability of the mortar, and overcomes the problems of easy shelling and hollowing of the mortar. The starch ether thickens the mortar, so that the surface of the mortar becomes smooth, the mortar is easy to coat, and the decorative effect is good. The gypsum retarder is used for reducing the gypsum setting speed, so that the newly mixed mortar can keep plasticity for a long time, and the construction is convenient. The toughening agent is used for improving the toughness of the gypsum mortar and preventing cracking.
The vitrified micro bubbles are used as fillers, have stable physicochemical properties, excellent heat insulation and fire resistance and can effectively improve the heat insulation performance of the mortar. The vitrified micro bubbles are modified, and the surface of the vitrified micro bubbles is coated with a layer of phenolic resin, so that the vitrified micro bubbles are prevented from absorbing water, the water absorption is reduced, and the long-term use effect of the gypsum mortar is ensured.
The gypsum mortar is in a dry powder form, is very convenient to transport and prepare, is directly and uniformly mixed with a proper amount of water on a construction site during application, and is coated on a wall by scraping.
Optionally, the phenolic resin is boron modified phenolic resin.
By adopting the technical scheme, the boron modified phenolic resin is prepared by introducing an inorganic boron element into the molecular structure of the phenolic resin, and compared with the common phenolic resin, the boron modified phenolic resin has more excellent mechanical property and more remarkable reinforcing effect of the modified vitrified micro bubbles. In addition, bonding exists between the boron modified phenolic resin and the vitrified micro bubbles, so that the coating is tighter and the modification effect is better.
Optionally, the gypsum mortar further comprises 0.8-1.3 parts of amino silicone oil.
By adopting the technical scheme, the amino silicone oil is beneficial to uniformly dispersing the vitrified micro bubbles coated by the boron modified phenolic resin in the gelled base material, so that the action effect of the modified vitrified micro bubbles is improved, and the water absorption of the gypsum mortar is reduced.
Optionally, a modification auxiliary agent is added in the preparation process of the modified vitrified micro bubbles, and the mass ratio of the modification auxiliary agent to the vitrified micro bubbles is (1-2: 10);
the preparation process of the modification auxiliary agent is as follows: firstly, mixing organic silicon and isopropanol to prepare an organic silicon solution with the concentration of 25-30wt%, then mixing 50-60 parts of silica sol and 15-20 parts of organic silicon solution, and continuously stirring for 2-3h to obtain the modification auxiliary agent.
By adopting the technical scheme, the modification auxiliary agent and the modifying agent act on the vitrified micro bubbles together to form a coating layer on the surface of the vitrified micro bubbles. Generally, the thermal conductivity of the vitrified micro bubbles is increased after the vitrified micro bubbles are modified by phenolic resin, and the thermal insulation performance of mortar is reduced. The addition of the modification auxiliary agent ensures that the influence on the heat conductivity coefficient of the modified vitrified micro bubbles is small, and the heat insulation performance of the mortar is ensured. Meanwhile, the strength of the vitrified microsphere coating layer is improved, the water absorption rate is reduced, and the method is favorable for improving the strength of the mortar and reducing the water absorption rate of the mortar.
Optionally, the preparation process of the organic silicon is as follows: firstly, uniformly mixing 15-20 parts of phenyltrimethoxysilane, 20-30 parts of isopropanol and 5-8 parts of diethylamine, heating to 85-95 ℃, introducing nitrogen for protection, then adding 0.04-0.08 part of tetra-n-butoxy titanium, stirring for reaction for 4-6h, and finally removing low-boiling-point substances in vacuum to obtain the organic silicon.
By adopting the technical scheme, the organic silicon and the phenolic resin have good compatibility and bonding property, the phenolic resin coating layer is compact, and the modification effect is good.
Optionally, the modified vitrified micro bubbles account for at least 80wt% of the cementing material.
By adopting the technical scheme, the thermal insulation performance of the mortar is obviously improved under the condition of high filling of the modified vitrified micro bubbles, and other performances still meet the requirements.
Optionally, the gypsum mortar further comprises 0.3-0.6 parts of tung oil.
By adopting the technical scheme, the modified vitrified micro bubbles are favorably and uniformly dispersed.
Optionally, the gypsum mortar further comprises 10-30 parts of mineral powder.
By adopting the technical scheme, the mineral powder has uniform color and luster and fine particles, the color of the wall surface is close to that of the interior wall putty after the mortar construction is finished, the surface is smooth and fine, the decorative effect is good, and the interior wall putty does not need to be scraped and coated.
Optionally, the gypsum mortar further comprises 0.1-0.3 parts of a lubricant.
By adopting the technical scheme, when the gypsum mortar is mixed with water, the lubricant can separate particles and is easy to move, the flow resistance is reduced, and the construction is convenient.
In summary, the present application has the following beneficial effects:
1. the application adopts the phenolic resin to modify the vitrified micro bubbles, the vitrified micro bubbles are modified, and the surface of the vitrified micro bubbles is coated with a layer of phenolic resin, so that the vitrified micro bubbles are prevented from absorbing water, the water absorption is reduced, and the long-term use effect of the gypsum mortar is ensured;
2. the organic silicon-silica sol mixed solution is preferably adopted to participate in the modification of the phenolic resin to the vitrified micro bubbles, so that the performance of a coating layer of the phenolic resin is improved, and the effect of the modified vitrified micro bubbles on the gypsum mortar is further improved.
Detailed Description
The present application is further described in detail with reference to the following examples, which are specifically illustrated by the following: the following examples, in which specific conditions are not specified, were conducted under conventional conditions or conditions recommended by the manufacturer, and the starting materials used in the following examples are available from ordinary commercial sources unless otherwise specified.
The embodiment of the application adopts the following raw materials:
the desulfurized gypsum is dihydrate desulfurized gypsum; the cement is PO42.5 common silicate cement powder; the grain size of the vitrified micro bubbles is 100 meshes; starch ether model number FP6, purchased from elvan, the netherlands; the silica sol was alkaline, had a solid content of 30wt%, and was model JN-1430-A1, purchased from Han Si products, Inc., Lin Yi City; lubricant, model 987, purchased from bike, germany; thermosetting ordinary phenolic resin, model 1411, purchased from aerospace high temperature resin materials ltd, yobo; thermosetting boron-modified phenolic resin, model No. PF9140, purchased from constant water, free brake insulation limited.
Examples of preparation of Silicone
Preparation example 1:
the preparation process of the organic silicon comprises the following steps: firstly, uniformly mixing 15 parts of phenyltrimethoxysilane, 20 parts of isopropanol and 5 parts of diethylamine, heating to 85 ℃, introducing nitrogen for protection, then adding 0.04 part of tetra-n-butoxy titanium, stirring for reaction for 4 hours, and finally removing low-boiling-point substances in vacuum at the temperature of 75 ℃ and the vacuum degree of 120kPa to obtain the organic silicon.
Preparation example 2:
the preparation process of the organic silicon comprises the following steps: firstly, uniformly mixing 20 parts of phenyltrimethoxysilane, 30 parts of isopropanol and 8 parts of diethylamine, heating to 95 ℃, introducing nitrogen for protection, then adding 0.08 part of tetra-n-butoxy titanium, stirring for reaction for 6 hours, and finally removing low-boiling-point substances in vacuum at the temperature of 75 ℃ and the vacuum degree of 120kPa to obtain the organic silicon.
Preparation example 3:
the preparation process of the organic silicon comprises the following steps: firstly, uniformly mixing 18 parts of phenyltrimethoxysilane, 25 parts of isopropanol and 6 parts of diethylamine, heating to 90 ℃, introducing nitrogen for protection, then adding 0.06 part of tetra-n-butoxy titanium, stirring for reaction for 5 hours, and finally removing low-boiling-point substances in vacuum at the temperature of 75 ℃ and the vacuum degree of 120kPa to obtain the organic silicon.
Example 1:
a premixed dry-mixed waterproof heat-preservation gypsum mortar is prepared by mixing 40 parts of desulfurized gypsum, 5 parts of cement, 20 parts of modified vitrified micro-beads, 0.1 part of hydroxypropyl methyl cellulose, 0.1 part of starch ether, 0.05 part of sodium citrate and 0.1 part of lignocellulose in parts by weight.
The preparation process of the modified vitrified micro bubbles is as follows: firstly, uniformly mixing 10 parts of common phenolic resin and 25 parts of absolute ethyl alcohol to obtain a modifier, uniformly mixing the modifier and the vitrified micro bubbles according to the mass ratio of 1:5, heating to 140 ℃, and curing for 30min to obtain the modified vitrified micro bubbles.
Example 2:
a premixed dry-mixed waterproof heat-preservation gypsum mortar is prepared by mixing 90 parts by weight of desulfurized gypsum, 35 parts by weight of cement, 40 parts by weight of modified vitrified micro-beads, 1 part by weight of hydroxypropyl methyl cellulose, 1 part by weight of starch ether, 0.05-2 parts by weight of sodium citrate and 1 part by weight of lignocellulose.
The preparation process of the modified vitrified micro bubbles is as follows: firstly, uniformly mixing 15 parts of ordinary phenolic resin and 30 parts of absolute ethyl alcohol to obtain a modifier, uniformly mixing the modifier and the vitrified micro bubbles in a mass ratio of 2:5, heating to 160 ℃, and curing for 20min to obtain the modified vitrified micro bubbles.
Example 3:
a premixed dry-mixed waterproof heat-preservation gypsum mortar is prepared by mixing, by weight, 60 parts of desulfurized gypsum, 20 parts of cement, 30 parts of modified vitrified micro-beads, 0.5 part of hydroxypropyl methyl cellulose, 0.5 part of starch ether, 1 part of sodium citrate and 0.5 part of lignocellulose.
The preparation process of the modified vitrified micro bubbles is as follows: firstly, uniformly mixing 12 parts of ordinary phenolic resin and 28 parts of absolute ethyl alcohol to obtain a modifier, uniformly mixing the modifier and the vitrified micro bubbles according to a mass ratio of 3:10, heating to 150 ℃, and curing for 25min to obtain the modified vitrified micro bubbles.
Example 4:
a premixed dry-mixed waterproof heat-preservation gypsum mortar is prepared by mixing 40 parts of desulfurized gypsum, 5 parts of cement, 40 parts of modified vitrified micro-beads, 0.5 part of hydroxypropyl methyl cellulose, 0.5 part of starch ether, 1 part of sodium citrate and 0.5 part of lignocellulose in parts by weight.
The preparation process of the modified vitrified micro bubbles is as follows: firstly, uniformly mixing 12 parts of ordinary phenolic resin and 28 parts of absolute ethyl alcohol to obtain a modifier, uniformly mixing the modifier and the vitrified micro bubbles according to a mass ratio of 3:10, heating to 150 ℃, and curing for 25min to obtain the modified vitrified micro bubbles.
Example 5:
the only difference from example 4 is that the modified vitrified microbead was prepared as follows: uniformly mixing 12 parts of ordinary phenolic resin and 28 parts of absolute ethyl alcohol to obtain a modifier, uniformly mixing the modifier, a modification auxiliary agent and the vitrified micro bubbles according to the mass ratio of 3:1:10, heating to 150 ℃, and curing for 25min to obtain the modified vitrified micro bubbles.
The preparation process of the modification auxiliary agent is as follows: firstly, mixing ethoxy trimethylsilane and isopropanol to prepare an organic silicon solution with the concentration of 25wt%, then mixing 50 parts of silica sol and 15 parts of organic silicon solution, and continuously stirring for 2 hours to obtain the modification auxiliary agent.
Example 6:
the only difference from example 4 is that the modified vitrified microbead was prepared as follows: uniformly mixing 12 parts of ordinary phenolic resin and 28 parts of absolute ethyl alcohol to obtain a modifier, uniformly mixing the modifier, a modification auxiliary agent and the vitrified micro bubbles according to the mass ratio of 3:2:10, heating to 150 ℃, and curing for 25min to obtain the modified vitrified micro bubbles.
The preparation process of the modification auxiliary agent is as follows: firstly, mixing ethoxy trimethylsilane and isopropanol to prepare an organic silicon solution with the concentration of 30wt%, then mixing 60 parts of silica sol and 20 parts of organic silicon solution, and continuously stirring for 3 hours to obtain the modification auxiliary agent.
Example 7:
the only difference from example 4 is that the modified vitrified microbead was prepared as follows: uniformly mixing 12 parts of ordinary phenolic resin and 28 parts of absolute ethyl alcohol to obtain a modifier, uniformly mixing the modifier, a modification auxiliary agent and the vitrified micro bubbles according to the mass ratio of 3:2:10, heating to 150 ℃, and curing for 25min to obtain the modified vitrified micro bubbles.
The preparation process of the modification auxiliary agent is as follows: firstly, mixing ethoxy trimethylsilane and isopropanol to prepare an organic silicon solution with the concentration of 28wt%, then mixing 55 parts of silica sol and 18 parts of organic silicon solution, and continuously stirring for 2.5h to obtain the modification auxiliary agent.
Example 8:
the difference from example 7 is only that ethoxytrimethylsilane and the like are replaced by the silicone obtained in preparation example 1.
Example 9:
the difference from example 7 is only that ethoxytrimethylsilane and the like are mass-exchanged for the silicone obtained in preparation example 2.
Example 10:
the difference from example 7 is only that ethoxytrimethylsilane and the like are replaced by the silicone obtained in preparation example 3.
Example 11:
the difference from example 10 is only that the ordinary phenol resin and the like are mass-replaced with the boron-modified phenol resin.
Example 12:
the only difference from example 11 is that the gypsum mortar also comprises 0.8 parts of amino silicone oil.
Example 13:
the only difference from example 11 is that the gypsum mortar also comprises 1.3 parts of amino silicone oil.
Example 14:
the only difference from example 13 is that the gypsum mortar also comprises 0.3 parts of tung oil.
Example 15:
the only difference from example 13 is that the gypsum mortar also comprises 0.6 parts of tung oil.
Example 16:
the only difference from example 15 is that the gypsum mortar also contains 10 parts of mineral powder.
Example 17:
the only difference from example 15 is that the gypsum mortar also contains 30 parts of mineral powder.
Example 18:
the only difference from example 16 is that the gypsum mortar also comprises 0.1 part of a lubricant.
Example 19:
the only difference from example 16 is that the gypsum mortar also comprises 0.3 parts of a lubricant.
Comparative example 1:
the difference from example 3 is only that the modified vitrified small balls are replaced by qualities such as ordinary vitrified small balls.
Comparative example 2:
the difference from example 4 is only that the modified vitrified small balls are replaced by qualities such as ordinary vitrified small balls.
Testing the performance of the gypsum mortar:
the gypsum mortar of examples 1-19 and comparative examples 1 and 2 is mixed with mixing water to prepare construction slurry, and the amount of the mixing water is determined according to the method of 'determination of standard diffusibility water consumption' in GB/T28627-.
With reference to the specifications of GB/T28627-2012 plastering gypsum and GB/T5486.3-2001 inorganic hard heat-insulating product test method density, water content and water absorption, the construction slurry is prepared into test pieces, and the test pieces are tested for 7d compressive strength, water absorption and thermal conductivity, and the obtained results are recorded in Table 1.
TABLE 1 Gypsum mortar Performance test results recording Table
| Compressive strength/MPa | Water absorption/%) | Coefficient of thermal conductivity | Compressive strength/MPa | Water absorption/%) | Coefficient of thermal conductivity | ||
| Example 1 | 0.82 | 7.5 | 0.091 | Example 12 | 1.12 | 4.8 | 0.041 |
| Example 2 | 0.84 | 7.2 | 0.088 | Example 13 | 1.15 | 4.8 | 0.038 |
| Example 3 | 0.81 | 7.5 | 0.092 | Example 14 | 1.18 | 4.7 | 0.036 |
| Example 4 | 0.77 | 8.1 | 0.057 | Example 15 | 1.21 | 4.5 | 0.033 |
| Example 5 | 0.93 | 6.2 | 0.048 | Example 16 | 1.22 | 4.6 | 0.033 |
| Example 6 | 0.96 | 6.1 | 0.051 | Example 17 | 1.23 | 4.9 | 0.034 |
| Example 7 | 0.95 | 6.0 | 0.050 | Example 18 | 1.22 | 4.7 | 0.032 |
| Example 8 | 1.03 | 5.3 | 0.046 | Example 19 | 1.24 | 4.6 | 0.031 |
| Example 9 | 0.98 | 5.2 | 0.048 | Comparative example 1 | 0.68 | 18.7 | 0.085 |
| Example 10 | 1.02 | 5.2 | 0.045 | Comparative example 2 | 0.33 | 23.2 | 0.052 |
| Example 11 | 1.07 | 4.9 | 0.041 | / | / | / | / |
As can be seen from table 1:
1. the test results of the examples 1-3 and the comparative example 1 are compared, so that the vitrified micro bubbles are modified, the water absorption of the mortar is reduced, the strength is improved, and the heat preservation performance is slightly deteriorated;
2. the comparison of the test results of examples 3 and 4 and the test result of comparative example 2 can show that the filling amount of the modified vitrified micro bubbles is increased, the thermal insulation performance of the gypsum mortar is obviously improved, but the compressive strength and the waterproof performance are slightly reduced, while the filling amount of the common vitrified micro bubbles is increased, the thermal insulation performance of the gypsum mortar is obviously improved, but the compressive strength and the waterproof performance are both obviously reduced;
3. the comparison of the test results of the example 4 and the examples 5 to 7 can show that the addition of the modification auxiliary agent in the process of modifying the vitrified micro bubbles is beneficial to improving the performance of the phenolic resin coating layer, so that the compressive strength of the gypsum mortar is improved, and the heat conductivity coefficient and the water absorption rate of the gypsum mortar are reduced;
4. compared with the test results of the example 7 and the examples 8-10, the organosilicon prepared by the method has better coating improving effect compared with ethoxytrimethylsilane, and contributes to the overall improvement of the performance of the gypsum mortar;
5. compared with the test results of the embodiment 10 and the embodiment 11, the test results show that the coating layer formed by the boron modified phenolic resin has better effect compared with the common phenolic resin, and is beneficial to improving the compressive strength of the gypsum mortar and reducing the heat conductivity coefficient and the water absorption rate of the gypsum mortar;
6. comparing the test results of example 11 and examples 12-15, it can be seen that both tung oil and amino silicone oil facilitate the uniform distribution of the modified vitrified micro bubbles and the bonding of the modified vitrified micro bubbles and the binding material, and improve the comprehensive properties of the gypsum mortar.
The present embodiment is only for explaining the present application, and it is not limited to the present application, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present application.
Claims (9)
1. The premixed dry-mixed waterproof heat-preservation gypsum mortar is characterized by comprising the following components in parts by weight:
40-90 parts of desulfurized gypsum;
5-35 parts of cement;
20-40 parts of modified vitrified micro bubbles;
0.1-1 part of cellulose;
0.1-1 part of starch ether;
0.05-2 parts of a gypsum retarder;
0.1-1 part of toughening agent;
the preparation process of the modified vitrified micro bubbles comprises the following steps: firstly, uniformly mixing 10-15 parts of thermosetting phenolic resin and 25-30 parts of absolute ethyl alcohol to obtain a modifier, uniformly mixing the modifier and the vitrified micro bubbles according to the mass ratio of (1-2:5), heating to 140-160 ℃, and curing for 20-30min to obtain the modified vitrified micro bubbles.
2. The ready-mixed dry-mixed waterproof thermal insulation gypsum mortar of claim 1, which is characterized in that: the phenolic resin is boron modified phenolic resin.
3. The ready-mixed dry-mixed waterproof thermal insulation gypsum mortar of claim 2, wherein: the gypsum mortar also comprises 0.8-1.3 parts of amino silicone oil.
4. The ready-mixed dry-mixed waterproof thermal insulation gypsum mortar of claim 1, which is characterized in that: a modification auxiliary agent is added in the preparation process of the modified vitrified micro bubbles, and the mass ratio of the modification auxiliary agent to the vitrified micro bubbles is (1-2: 10);
the preparation process of the modification auxiliary agent is as follows: firstly, mixing organic silicon and isopropanol to prepare an organic silicon solution with the concentration of 25-30wt%, then mixing 50-60 parts of silica sol and 15-20 parts of organic silicon solution, and continuously stirring for 2-3h to obtain the modification auxiliary agent.
5. The ready-mixed dry-mixed waterproof thermal insulation gypsum mortar according to claim 4, wherein: the preparation process of the organic silicon comprises the following steps: firstly, uniformly mixing 15-20 parts of phenyltrimethoxysilane, 20-30 parts of isopropanol and 5-8 parts of diethylamine, heating to 85-95 ℃, introducing nitrogen for protection, then adding 0.04-0.08 part of tetra-n-butoxy titanium, stirring for reaction for 4-6h, and finally removing low-boiling-point substances in vacuum to obtain the organic silicon.
6. The ready-mixed dry-mixed waterproof thermal insulation gypsum mortar of claim 5, wherein: the modified vitrified micro bubbles at least account for 80wt% of the cementing material.
7. The ready-mixed dry-mixed waterproof thermal insulation gypsum mortar of claim 1, which is characterized in that: the gypsum mortar also comprises 0.3-0.6 part of tung oil.
8. The ready-mixed dry-mixed waterproof thermal insulation gypsum mortar of claim 1, which is characterized in that: the gypsum mortar also comprises 10-30 parts of mineral powder.
9. The ready-mixed dry-mixed waterproof thermal insulation gypsum mortar of claim 1, which is characterized in that: the gypsum mortar also comprises 0.1-0.3 part of lubricant.
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Denomination of invention: A pre mixed dry mixed waterproof and insulation gypsum mortar Effective date of registration: 20231030 Granted publication date: 20220920 Pledgee: Wenzhou Dongtou District sub branch of Postal Savings Bank of China Pledgor: WENZHOU MINGYUAN NOVEL BUILDING MATERIAL CO.,LTD. Registration number: Y2023330002497 |